PHA Polyhydroxy Acids

A new family of chemical exfoliators has taken skincare by storm; but what are PHAs—polyhydroxy acids—and why include them in our beauty rituals?

About PHA Polyhydroxy Acids

PHAs are second-generation skincare acids that help to resurface and retexturize for a softer, plumper appearance and reduced fine lines. Locking in moisture, they build natural defenses and protect against external aggressors while their large molecular weight is slow-penetrating and gentler on sensitive skin.

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What are PHAs in skincare?

Technically speaking, PHAs are considered second-generation AHAs, which means they are simply a more advanced version of chemical exfoliant. Gluconolactone is the most common PHA. You can find it in our Micellar Gentle Peeling Water. The thing that makes them different from their AHA and BHA counterparts, though, is the molecular structure. PHAs have a large molecular size and so it stays on the skin surface – which is where their power lies, while respecting the skin barrier.

How do PHAs work?

Although they don’t penetrate as deeply, polyhydroxy acids such as gluconolactone still work in a similar way to both AHAs and BHAs. At Garnier, we use in Micellar Gentle Peeling Water the PHA gluconolactone that exfoliates dead skin cells on the surface of the skin, giving it a more even tone and improving its overall texture, minimising pores. And that’s not quite everything – gluconolactone plays a role in the epidermis barrier, providing your skin with a gentle exfoliation, while respecting the skin barrier. PHAs are true miracle workers with a multitude of benefits.

Are PHAs suitable for sensitive skin types?

Yes! PHAs are a good choice for those with sensitive skin, and the reason why comes down to the molecule size. Their large molecular structure allows them to stay on the skin's surface while respecting its barrier

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